CVE-2008-3831

Priority

Medium

Description

The i915 driver in (1) drivers/char/drm/i915_dma.c in the Linux kernel2.6.24 on Debian GNU/Linux and (2) sys/dev/pci/drm/i915_drv.c in OpenBSDdoes not restrict the DRM_I915_HWS_ADDR ioctl to the Direct RenderingManager (DRM) master, which allows local users to cause a denial of service(memory corruption) via a crafted ioctl call, related to absence of theDRM_MASTER and DRM_ROOT_ONLY flags in the ioctl's configuration.

Ubuntu-Description

It was discovered the the i915 video driver did not correctly validatememory addresses. A local attacker could exploit this to remap memorythat could cause a system crash, leading to a denial of service.This issue did not affect Ubuntu 6.06 and was previous fixed for Ubuntu7.10 and 8.04 in USN-659-1. Ubuntu 8.10 has now been corrected as well.